Book/Report FZJ-2018-07156

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Pion- und photoninduzierte Reaktionen an Kernen im $\Delta$-Resonanzbereich



1994
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 2991, 95 p. ()

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Report No.: Juel-2991

Abstract: In the present work pion- and photoinduced nuclear reactions in the $\Delta$ resonance energy region are studied. In particular, we investigate the propagation of the $\Delta$ inside the nucleus. It is found that the propagation of the $\Delta$ in the medium can be interpreted in terms of a coherent pion wave. The behaviour of the $\Delta$ resonance in the nucleus is studied vy means of various inclusive and exclusive processes. These different reactions give complementary information on the properties of the $\Delta$ in nuclei. Elastic pion-scattering, coherent pion photoproduction and elastic Compton-scattering allow us to study the spin-longitudinal and spin-transverse channels, their their mixing and their influence on the coherent medium effect. The quasi-free decay reaction and the 2-nucleon.knockout reaction give information on the damping mechanisms of the coherent pion wave inside the nucleus. Additionally, they allow us to study the momentum distribution of the nucleons and the $\Delta$ in the nucleus. Our model describes consistently the pion- and potoinduced reactions as well as charge exchange reactions. [...]


Contributing Institute(s):
  1. Publikationen vor 2000 (PRE-2000)
Research Program(s):
  1. 899 - ohne Topic (POF3-899) (POF3-899)

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 Record created 2018-12-07, last modified 2021-01-29